SU-lhcb-MC-gen

A suite of scripts for generating MC on lhcb-dev

Deprecated

This project has been superseded by SU-LHCb-MC on GitLab.

About

This is a suite of scripts designed to make life easier for people submitting MC jobs (or any jobs) to Condor on lhcb-dev. It revolves around the use of configuration files and the script run_stages.py.

In order to use this suite, simply clone the git repo, create a configuration file, and off you go! There are sample configuration files and templates in the samples/ and templates/ directories. You should be able to find what you need there.

Don't be shy about contributing! If you have a configuration file you're proud of, add it to the samples! See CONTRIBUTING.md.

Requirements

This suite is designed to work with python 2.7 on lhcb-dev.

It is recommended, but not required, that users install the progressbar package.

Getting Started

To get a feel for the suite, try running a sample configuration file. Just do (preferably in a screen or tmux session):

python submit_to_condor.py mytestjob samples/configuration_files/GeneratorLevelMC_2016.py --setlohi 100000 100010

(^C will cancel and ^Z will pause. [This won't affect any jobs submitted to Condor.])

submit_to_condor.py is your primary interaction point with this suite. It takes a name for your job, a configuration file, and the runnumbers you want to use and submits them in batches to Condor. (It's best to run it in a tmux or screen session.) It will wait while your jobs run and periodically check on their progress, submitting more jobs as they complete. This helps you be a good citizen in your use of Condor by avoiding having too many jobs running at once. It will even move your jobs from their running device (usually /data2) to a storage device inaccessible to Condor (e.g., /data6)!

Exploring the Jobs

Leave submit_to_condor.py running for now. In another shell, do

condor_q <your username>

You should see (100010 - 100000 = ) 10 jobs listed, either running or idle. These are the 10 jobs you submitted to Condor! They will handle whatever script you submitted while you wait, whether you are logged in or not.

Once all your jobs have started running, if you look in /data2/<your username>/work/mytestjob/, you should see directories named [100000, 100009]. These are the so-called WORK_DIR for each of the 10 jobs you submitted and all your job's output should be stored here while it runs.

In each job's WORK_DIR, you should see a file called mytestjob_*_general.log, which summarizes the job progress. Each stage of the job generates an additional log file, usually called <jobname>_<jobnumber>_<stagename>.log. As each job progresses, you should see more and more files stored in this directory.

If a job fails to complete for whatever reason, all files will remain in the WORK_DIR. This allows you to easily see which of your jobs had problems and prevents them from being moved to storage before they are ready.

NB: If the WORK_DIR already exists, your job will not run by default; this is to prevent accidental overwrites. Best practice is to remove the numbered directories manually, but if you're very sure you want to overwrite any existing data, you can use --WORK_DIR_EXISTS when you run.

WORK_DIR refers to the numbered directory, e.g., /data2/<your username>/work/mytestjob/100000/, not /data2/<your username>/work/mytestjob/, which just helps organize the many WORK_DIR and will not prevent the job from running.

Once the job completes, run_stages.py (the script that submit_to_condor.py submits to Condor) moves the output from the WORK_DIR to the DATA_DIR and LOG_DIR. From there, submit_to_condor.py picks the output up and moves it to directories on the storage device (/data6 by default). If you look in /data6/<your username>/data/mytestjob/100000/ and /data6/<your username>/log/mytestjob/100000/ after the job completes, you should see the output files from the job.

Congratulations, you've successfully submitted your first jobs!

Submission and Configuration Files

Running jobs revolves around the use of configuration files. These tell run_stages.py what to do. The easiest way to write them is to use a template (see Using Templates below). Once you are confident your configuration file works the way you want it to (see Testing below), you pass it as an argument to either run_stages.py or submit_to_condor.py (which passes it to run_scripts.py).

DO NOT CHANGE YOUR CONFIGURATION FILE WHILE YOUR JOBS ARE RUNNING OR SUBMITTING. This will result in your jobs' behavior changing mid-submission!

You are encouraged to write add your own command-line arguments to your configuration file using the argparse module in python.

If you add your own command-line arguments, make sure they are optional (e.g., have -- in front of their names) to help avoid potential conflicts with other scripts.

You can pass your configuration-file arguments to both run_stages.py and submit_to_condor.py. They know how to handle them.

You can read more about run_stages.py and submit_to_condor.py in the Detailed Description section below.

Using Templates

Templates are easy-to-edit, almost ready-to-go configuration files. They contain edit points enclosed by <<<< >>>>. Simply copy the file to your directory, search for <<<< or >>>> inside the file, make the appropriate edits, and you're ready to go. (Note you will need to overwrite the <<<< and >>>>—do not leave them in the file! You'll know you've made all the necessary changes when <<<< and >>>> no longer appear in the file.)

Testing

Once you've written or selected a configuration file, you should test it before submitting to condor. First, run python run_stages.py <path/to/configfile> and check the output. Then, submit a small batch to Condor using python submit_to_condor.py <jobname> <path/to/configfile> --setlohi 100000 100010 --test , wait for it to finish, then check the output. If everything is as-expected, you can go ahead and submit for real using submit_to_condor.py.

Remember that run_stages.py does not know what you are trying to do. It's up to you to make sure your scripts actually work and that any environments you use (e.g., a local Gauss build) are built properly

Questions

If you have questions or feedback, open an Issue in the repository.

Contributing

See CONTRIBUTING.md.

Detailed Description

What follows is an explanation of how to use SU-lhcb-MC-gen:

organization

The following organizational structure is fundamental to SU-lhcb-MC-gen:

WORK_DIR = <sys>/<user>/work/<jobname>/<jobnum>
DATA_DIR = <sys>/<user>/data/<jobname>/<jobnum>
LOG_DIR = <sys>/<user>/log/<jobname>/<jobnum>

sys is the path to the system the job should run on (usually /data2). jobnum is the sub-job number for the jobname.

Scripts run in the work directory, data files are stored in the data directory, and log files are stored in the log directory. The scripts in this suite rely on this structure and will not work without it. Keep this in mind, particularly when developing.

run_stages.py

At the heart of SU-lhcb-MC-gen is run_stages.py. This does most of the leg-work to run scripts. run_stages.py centers around a function in the configuration file called make_stage_list, which describes the scripts to be run, how, and in what order. If you do not want to submit in-batch, you can run run_stages.py on its own.

run_stages.py is script-agnostic. You can run whatever sort of code you like using it, so long as the code fits in the make_stage_list framework.

make_stage_list()

This function must appear in your configfile and return a list of dictionaries of the following form:

def make_stage_list(USER, BASE_NAME):  # DO NOT CHANGE THIS LINE; run_stages.py will pass its USER and BASE_NAME parameters--you may refer to them inside this function if you want to
    stage_list = [
        {
            'name': 'stagename',  # what run_stages.py should call this stage
            'scripts': {'desired/relative/path/to/script.ext': 'scriptcontent'},  # run_stages.py will create WORK_DIR/desired/relative/path/to/script.ext and write scriptcontent into it for every item in this dictionary
            'log': 'logfilename',  # stdout and stderr will be directed to this file while this stage runs
            'call_string': 'a tcsh command',  # run_stages.py will call this string with subprocess.call in a tsch shell; make sure to point it at your 'scripts' above if desired
            'to_remove': ['filenames_to_remove_after_stage_runs'],  # stuff with the names in this list, if they exist, will be removed after the stage completes successfully
            'required': ['filenames_needed_to_run_this_stage'],  # list stuff required for the stage to run here, generally data files produced by earlier stages. run_stages.py will fetch them from the DATA_DIR if they are not in the WORK_DIR already and throw an error if they are not found (unless the SOME_MISSING option is used, as when running with submit_to_condor.py \[which uses this option automatically\], in which case no error is thrown--the stage is skipped and the job continues as it otherwise would)
            'data': ['filenames_to_be_put_in_data_directory'],  # these files will be moved to DATA_DIR; all other non-removed files and directories will be moved to LOG_DIR
            'run': True,  # if this is False, run_stages.py will skip this stage
            'scriptonly': False,  # if this is True (and 'run' is True), run_stages.py will write scripts but will not run the stage; cleanup still happens
        }
    ]
        
    return stage_list

This function determines everything that happens in your job. run_stages.py will run the 'call_string' (along with some environment-setting parameters) inside a fresh tcsh shell for each stage sequentially. This means that each stage can refer to and use the output of previous stages.

run_stages.py is script agnostic, meaning it does not care what sort of thing you tell it to run. This means it's your responsibility to make sure the script run in each stage picks up the output from the previous stage if you want it to.

Relative file paths are essential for this. The WORK_DIR is the current working directory while your job runs, so all output files are created there and can be referred to by name by other stages in your script.

arguments

A number of arguments are essential to run_stages.py and they must appear in your configfile. There are, in theory, other ways to declare these parameters besides using argparse, but this method is highly recommended. See the help string for each argument to understand what it does.

# -- essential parameters -- #
parser = argparse.ArgumentParser(
    formatter_class=argparse.ArgumentDefaultsHelpFormatter, description='set parameters to be used in run_stages.py')

parser.add_argument('configfile', type=os.path.abspath,
                    help='this argument must be here to ensure integration with run_stages.py')
parser.add_argument('--SIGNAL_NAME', default='TestProduction',
                    help='what you want the organizing directory for your job to be named. submit_to_condor.py sets this parameter when it submits jobs.')
parser.add_argument('--RUN_NUMBER', type=int, default=300000,
                    help='set equal to the job number by submit_to_condor.py, which allows the user to change script behavior for each job, e.g., set a different random seed.')
parser.add_argument('--RUN_SYS', default='/data2', type=os.path.abspath,
                    help='system to run on')
cleangroup = parser.add_argument_group('cleaning options')
cleangroup.add_argument('--noCLEANSTAGES', dest='CLEANSTAGES', action='store_false',
                        help='CLEANSTAGES deletes data from earlier stages as it goes.')
cleangroup.add_argument('--noCLEANWORK', dest='CLEANWORK', action='store_false',
                        help='CLEANWORK moves files out of work directory.')
cleangroup.add_argument('--SOME_MISSING', action='store_true',
                        help='if running a later stage, you may specify this argument to let the script terminate without errors if the input files are missing. Used automatically by submit_to_condor.py')
debuggroup = parser.add_argument_group('debugging options')
debuggroup.add_argument('--SCRIPT_ONLY', action='store_true',
                        help='creates scripts without running them')
debuggroup.add_argument('--WORK_DIR_EXISTS', action='store_true',
                        help='BE VERY CAREFUL WHEN USING THIS FLAG: gives permission to run if WORK_DIR already exists! Also allows overwrite of extant Opts directories.')

# -- evaluate and check arguments -- #
# -- mandatory section -- #
args = parser.parse_args() if basename(__main__.__file__) == 'run_stages.py' else parser.parse_known_args()[0]  # assume all arguments are for this script if 'run_stages.py' is the main file, else allow arguments to go to other scripts
for arg in vars(args):
    exec('{ARG} = args.{ARG}'.format(ARG=arg))  # eliminate need to reference things as arg.thing
# -- end mandatory section -- #

You can also add your own custom arguments inside your configfile! run_stages.py won't care about them, but your configfile will still see them. submit_to_condor.py is even written with this in mind—submit_to_condor.py <jobname> <path/to/configfile> <your arguments> should work just fine, as long as your arguments don't conflict with the ones used by this suite.

If you add your own command-line arguments, make sure they are optional (e.g., have -- in front of their names) to help avoid potential conflicts with other scripts.

moveFiles.py

This script contains helpful functions for moving completed jobs from the run_sys to the store_sys. It has many useful options; see the in-file documentation. If your job submission goes smoothly, you probably will not have to interact with this file directly.

submit_to_condor.py

This script is built around moveFiles.py. It uses the same commandline arguments (plus some others) but reappropriates them so that files can be moved around run_stages.py, which submit_to_condor.py runs on Condor in batches. You can also pass it any arguments declared in your configfile. It is recommended to run this file using screen or tmux. (See the man files for each of these if you're not familiar.)

This is the heart of SU-lhcb-MC-gen. Once you've tested your configfile, you should only have to run this script (if nothing goes awry).

--chunks_of

This is the main parameter that allows you to be a good citizen on Condor. This parameter specifies the maximum number of jobs you want to have on Condor and run_sys at once. The default value should be fine most of the time, but if you have particularly slow jobs (that take more than two hours to run, say), you should consider reducing it. If your jobs are particularly fast (say, less than 10 minutes), you can use a larger value.

--setlohi and --runfromstorage

When you use submit_to_condor.py, you must use one of these two options.

--setlohi

sets the low (inclusive) and high (exclusive) RUN_NUMBER you want to use. So --setlohi 100000 101234 will submit 1234 jobs with RUN_NUMBER equal to [100000, 101233).

NB: If you are using submit_to_condor.py to submit Monte Carlo, this is not equal to the number of events. You will end up with a number of events equal to (hi - lo) * NUM_EVENT, where NUM_EVENT is the number of events generated in each job

--runfromstorage

Use this option if you want to run over pre-existing runs. It will find all the run numbers in the DATA_DIR on store_sys for this SIGNAL_NAME, and move this data to the run_sys, where run_stages.py will be able to get to it.

run_stages.py looks at the 'required' key in each stage's dictionary and moves the files listed there from the DATA_DIR to the WORK_DIR so that they are available for the stage to use. Don't worry — they get put back into the DATA_DIR just as though you had listed them as data files.

This is a powerful utility that means you do not have to run all of your stages at once. For example, suppose you want to generate MC using samples/configuration_files/basic_MCGen_2016_s28r1_WithArguments.py. You could generate just through the Brunel stage by doing:

python submit_to_condor.py myMCgen samples/configuration_files/basic_MCGen_2016_s28r1_WithArguments.py --GEN_LEVEL gauss boole moorel0 moorehlt1 moorehlt2 brunel --setlohi 100000 100100

Once these jobs finish, if you decide you do want to run the DaVinci stage to get stripped data, you could do:

python submit_to_condor.py myMCgen samples/configuration_files/basic_MCGen_2016_s28r1_WithArguments.py --GEN_LEVEL davinci --runfromstorage

This will take all the MC that you successfully generated before and move the data files to where DaVinci can get them on the run_sys instead of leaving them on the store_sys. If some of your jobs failed, they will be skipped.

You can still specify a specific job range with --setlohi if you use --runfromstorage. Suppose you only wanted to run the DaVinci stage over the first 50 jobs (for whatever reason). Just add --setlohi 100000 100050:

python submit_to_condor.py myMCgen samples/configuration_files/basic_MCGen_2016_s28r1_WithArguments.py --GEN_LEVEL davinci --runfromstorage --setlohi 100000 100050

Note that using --setlohi 0 100050 would have had the same effect: When --runfromstorage is specified, --setlohi just ensures the run numbers fall within the specified range.

What if submit_to_condor.py quits?

Check the output on screen to see how far it got. If there's nothing wrong with your jobs, you can just run it again with --setlohi <lo> <hi>, where <lo> is the top end of the last successfully submitted range and <hi> is the highest run number desired. For instance, if it quit while the range [100100, 100200) out of [100000, 105000) was running, you would use --setlohi 100200 105000.

Remember that Condor is a separate system, and it's where your jobs actually run. submit_to_condor.py just handles the submission process.